Abdominal exercise machine



FIG. 1 is a perspective view of an abdominal exercise machine showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a side elevation view thereof, showing the right side;

FIG. 5 is a side elevation view thereof, showing the left side;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the figures are for the purposes of illustrating portions of the abdominal exercise machine, which form no part of the claimed design. 

CLAIM The ornamental design for an abdominal exercise machine, as shown and described. 